One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10,13,14)(11,15,16,12)(17,18,22,23)(19,24,21,20)(25,26)(27,32)(28,33)(29,37)(30,31)(34,39)(35,36)(38,40)(1,2,4,5)(3,7,8,6)(9,10)(11,15)(12,16)(13,14)(17,19)(18,20)(21,22)(23,24)(26,31)(28,32)(34,37)(36,40)(2,5)(6,7)(10,14)(12,15)(17,20,22,24)(18,19,23,21)(25,27)(26,32)(28,31)(29,38)(30,33)(34,36)(35,39)(37,40)(1,3)(2,6)(4,8)(5,7)(9,11)(10,12)(13,16)(14,15)(17,21,22,19)(18,20,23,24)(25,28,30,32)(26,33,31,27)(29,36,39,40)(34,38,37,35)(1,2)(3,6)(4,5)(7,8)(9,12)(10,11)(13,15)(14,16)(17,20)(18,19)(21,23)(22,24)(25,29,30,39)(26,34,31,37)(27,35,33,38)(28,36,32,40)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.